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Network security

Network security consists of provisions and policies to prevent unauthorized access to computer networks and resources. Common network security threats include viruses, worms, Trojan horses, spyware, adware, and hacker attacks. Solutions to these threats include anti-virus software, firewalls, intrusion prevention systems, and virtual private networks. Properly configuring and updating these network security components helps minimize risks while allowing authorized access to network resources.

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NETWORK SECURITY 1
CONTENT 1-Introduction 2-Definition 3-Threats 4-Solution 5-Conclusion 2
Introduction While computer systems today have some of the best security system ever,they are more vulnerable than ever before. This vulnerability stems from the world wide access to computer system via internet. Computer and network security comes in many form 1-encryption algorithm 2-access to facilities 3-digital signatures 4-fingerprints and face scans as passwords 3
Definition: Network security consist of provisions and policies adopted by network administrator to prevent and monitor unauthorized access,misuse,modification or denial of computer network and network accessible resources. 4
Threats Many network security threats are spread over the internet.The most common include: 1-Viruses and Worms 2-Trojan horses 3-Spyware 4-Adware 5-Hacker attack 5
1-Viruses Viruses works and spread by attaching themselves to other pieces of software such that during the execution of the program the viral code is executed. Corrupt and modifies the system files on your computer to cause damage distributed to various storage medium such as flash drive. 6
2- Worms Worms are stand-alone software that does not have to attach itself to a program in your system like a computer virus Damage the computer network by causing increase bandwidth 7
3-Trojan horses Trojan horses is a very deceptive program that appear harmless but it is actually one of the most dangerous type of malware it may appear as a friendly email attached or present itself as a useful application on a website It does not have the ability to self replicate but to deliver destructive payloads and viruses,worms and spyware. 8
4-Spyware spyware is a software that gathers information through the user's internet connection without his or her knowledge,usually for advertising purposes. Another kind of spyware may make changing in your computer and cause slowing down of computer or crashing which can be annoying such as changing your web page or adding additional component. 9
5-Adware Adware is essentially add- supported software that has the ability to track your activity. 10
6-HACKER ATTACK In a computer security a hacker is the one who seeks and exploits weaknesses in a computer network. Hackers may be motivated by multitudes of reasons such as profit ,protest and challenge. 11
Network security is accomplished through software and hardware.The software must be constantly updated and manage to protect you from emerging threats. network security may consist of many components. ideally all components work together which minimizes maintenance and improve security. Network Security 12
Network security includes following components. 1- Anti - viruses and anti -spyware 2- Firewall -to stop unauthorized access to your computer 3- IPS- intrusion prevention system 4- VPNs- virtual private networks Components 13
An anti virus software program is a computer program that can be used to scan files to identify and eliminate computer viruses and other malicious software. Anti virus works in two different ways : 1-Examine file to look for unknown virus by mean of virus dictionary OR 2-Identify suspicious behaviour from any computer program which might indicate infection. Anti virus 14
A system or combination of system that support and control access policy between two networks . A firewall can limit the type of transactions that enter a system, as well as all type of transactions that leave the system. it can also be programmed to stop certain type or ranges of IP addresses, as well as certain type of TCp port numbers(applications). Firewall 15
IPS is a network security/prevention technology that examines network traffic flow to detect and prevent vulnerability exploits. IPS has number of detection methods for finding exploits,but signature- based detection and statistical anomaly based detections are two dominant mechanisms. IPS-intrusion prevention system 16
VPns are used to establish an encrypted connection across a network while using internet as its transmission medium. Two Benefits : 1-It is inexpensive 2-A secure data connection is established. VPNs-virtual private network 17
CONCLUSION we see that it is important to secure our network for various reasons because they are used to store sensitive and important data which we want to keep secure as it might be used for malicious content in the wrong hands 18
Thank You 19
Saham Fatima Mehru Nisa Rabia Hashmat 20